EP1597774A1 - Optoelektronisches bauelement mit einer leuchtdiode und einem lichtsensor - Google Patents
Optoelektronisches bauelement mit einer leuchtdiode und einem lichtsensorInfo
- Publication number
- EP1597774A1 EP1597774A1 EP03735418A EP03735418A EP1597774A1 EP 1597774 A1 EP1597774 A1 EP 1597774A1 EP 03735418 A EP03735418 A EP 03735418A EP 03735418 A EP03735418 A EP 03735418A EP 1597774 A1 EP1597774 A1 EP 1597774A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- light
- emitting diode
- optoelectronic component
- substrate
- sensor
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 230000005693 optoelectronics Effects 0.000 title claims abstract description 79
- 239000000758 substrate Substances 0.000 claims abstract description 62
- 239000011368 organic material Substances 0.000 claims abstract description 13
- 230000003287 optical effect Effects 0.000 claims description 40
- 238000004519 manufacturing process Methods 0.000 claims description 27
- 239000004020 conductor Substances 0.000 claims description 21
- 239000004065 semiconductor Substances 0.000 claims description 17
- 238000000034 method Methods 0.000 claims description 14
- 238000002161 passivation Methods 0.000 claims description 9
- 239000000463 material Substances 0.000 claims description 4
- 230000005855 radiation Effects 0.000 claims description 3
- 238000009792 diffusion process Methods 0.000 claims description 2
- 239000002019 doping agent Substances 0.000 claims description 2
- 238000002513 implantation Methods 0.000 claims description 2
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- 238000001465 metallisation Methods 0.000 description 8
- 238000005516 engineering process Methods 0.000 description 7
- 230000001419 dependent effect Effects 0.000 description 3
- 238000001514 detection method Methods 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 230000018109 developmental process Effects 0.000 description 2
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- 238000011156 evaluation Methods 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 150000002894 organic compounds Chemical class 0.000 description 2
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- 239000000126 substance Substances 0.000 description 1
Classifications
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K39/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic radiation-sensitive element covered by group H10K30/00
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L27/00—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate
- H01L27/14—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate including semiconductor components sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation
- H01L27/144—Devices controlled by radiation
- H01L27/1446—Devices controlled by radiation in a repetitive configuration
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L31/00—Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
- H01L31/12—Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof structurally associated with, e.g. formed in or on a common substrate with, one or more electric light sources, e.g. electroluminescent light sources, and electrically or optically coupled thereto
- H01L31/125—Composite devices with photosensitive elements and electroluminescent elements within one single body
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L31/00—Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
- H01L31/12—Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof structurally associated with, e.g. formed in or on a common substrate with, one or more electric light sources, e.g. electroluminescent light sources, and electrically or optically coupled thereto
- H01L31/14—Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof structurally associated with, e.g. formed in or on a common substrate with, one or more electric light sources, e.g. electroluminescent light sources, and electrically or optically coupled thereto the light source or sources being controlled by the semiconductor device sensitive to radiation, e.g. image converters, image amplifiers or image storage devices
- H01L31/147—Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof structurally associated with, e.g. formed in or on a common substrate with, one or more electric light sources, e.g. electroluminescent light sources, and electrically or optically coupled thereto the light source or sources being controlled by the semiconductor device sensitive to radiation, e.g. image converters, image amplifiers or image storage devices the light sources and the devices sensitive to radiation all being semiconductor devices characterised by potential barriers
- H01L31/153—Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof structurally associated with, e.g. formed in or on a common substrate with, one or more electric light sources, e.g. electroluminescent light sources, and electrically or optically coupled thereto the light source or sources being controlled by the semiconductor device sensitive to radiation, e.g. image converters, image amplifiers or image storage devices the light sources and the devices sensitive to radiation all being semiconductor devices characterised by potential barriers formed in, or on, a common substrate
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L31/00—Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
- H01L31/12—Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof structurally associated with, e.g. formed in or on a common substrate with, one or more electric light sources, e.g. electroluminescent light sources, and electrically or optically coupled thereto
- H01L31/16—Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof structurally associated with, e.g. formed in or on a common substrate with, one or more electric light sources, e.g. electroluminescent light sources, and electrically or optically coupled thereto the semiconductor device sensitive to radiation being controlled by the light source or sources
- H01L31/167—Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof structurally associated with, e.g. formed in or on a common substrate with, one or more electric light sources, e.g. electroluminescent light sources, and electrically or optically coupled thereto the semiconductor device sensitive to radiation being controlled by the light source or sources the light sources and the devices sensitive to radiation all being semiconductor devices characterised by potential barriers
- H01L31/173—Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof structurally associated with, e.g. formed in or on a common substrate with, one or more electric light sources, e.g. electroluminescent light sources, and electrically or optically coupled thereto the semiconductor device sensitive to radiation being controlled by the light source or sources the light sources and the devices sensitive to radiation all being semiconductor devices characterised by potential barriers formed in, or on, a common substrate
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L31/00—Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
- H01L31/18—Processes or apparatus specially adapted for the manufacture or treatment of these devices or of parts thereof
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L2224/00—Indexing scheme for arrangements for connecting or disconnecting semiconductor or solid-state bodies and methods related thereto as covered by H01L24/00
- H01L2224/01—Means for bonding being attached to, or being formed on, the surface to be connected, e.g. chip-to-package, die-attach, "first-level" interconnects; Manufacturing methods related thereto
- H01L2224/42—Wire connectors; Manufacturing methods related thereto
- H01L2224/47—Structure, shape, material or disposition of the wire connectors after the connecting process
- H01L2224/48—Structure, shape, material or disposition of the wire connectors after the connecting process of an individual wire connector
- H01L2224/484—Connecting portions
- H01L2224/4847—Connecting portions the connecting portion on the bonding area of the semiconductor or solid-state body being a wedge bond
- H01L2224/48472—Connecting portions the connecting portion on the bonding area of the semiconductor or solid-state body being a wedge bond the other connecting portion not on the bonding area also being a wedge bond, i.e. wedge-to-wedge
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L2924/00—Indexing scheme for arrangements or methods for connecting or disconnecting semiconductor or solid-state bodies as covered by H01L24/00
- H01L2924/10—Details of semiconductor or other solid state devices to be connected
- H01L2924/102—Material of the semiconductor or solid state bodies
- H01L2924/1025—Semiconducting materials
- H01L2924/10251—Elemental semiconductors, i.e. Group IV
- H01L2924/10253—Silicon [Si]
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L2924/00—Indexing scheme for arrangements or methods for connecting or disconnecting semiconductor or solid-state bodies as covered by H01L24/00
- H01L2924/10—Details of semiconductor or other solid state devices to be connected
- H01L2924/11—Device type
- H01L2924/12—Passive devices, e.g. 2 terminal devices
- H01L2924/1204—Optical Diode
- H01L2924/12044—OLED
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L2924/00—Indexing scheme for arrangements or methods for connecting or disconnecting semiconductor or solid-state bodies as covered by H01L24/00
- H01L2924/30—Technical effects
- H01L2924/301—Electrical effects
- H01L2924/3011—Impedance
Definitions
- Optoelectronic component with a light emitting diode and a light sensor
- the present invention relates to an optoelectronic component with a light-emitting diode and a light sensor, which can be used in particular for detecting a path length, an angle of rotation, a distance or a position, and to a method for its production.
- optoelectronic components or systems are used to record distances, distances, angles of rotation, positions and other variables.
- optoelectronic components which comprise a light source or radiation source and a light sensor or a light-sensitive detector.
- Light emitted by the light source is directed onto the light sensor by an optical component.
- the optical component is, for example, a reflector, a mirror or another reflective component, an optical grating or another light diffraction device.
- the intensity of the light received by the light sensor depends on the distance of the optical component from the optoelectronic component or on its spatial orientation. The light received by the light sensor can therefore be used to infer the distance, the location or the spatial orientation of the optical component relative to the optoelectronic component.
- no optical component is used, but the light emitted by the light-emitting diode is reflected by an object to be detected. From the reflected light received by the light sensor can be deduced from the location, arrangement, size or other properties of the object.
- One example is the “out of position ⁇ V detection of a passenger in a motor vehicle in relation to an airbag.
- Photodiodes, phototransistors, photoresistors or similar semiconductor components are often used as light sensors. Instead of a single light sensor, multiple light sensors are often used, which can be arranged one-dimensionally as a row or two-dimensionally as an array. The use of multiple light sensors enables the detection of simple geometrical images or of diffraction or interference patterns.
- Light-emitting diodes or light-emitting diodes are often used as light sources. In order to distinguish light that is emitted by the light source and directed onto the light sensor from light of another origin, the light source frequently emits a characteristic signature or a light signal with a time dependency that is known to an evaluation electronics connected downstream of the light sensor.
- FIG. 2 is a schematic representation of a section through an optoelectronic component as described in DE 19720300.
- An Si substrate or chip 10 has a depression 14 on a surface 12.
- An SMD light-emitting diode 16 is arranged in the recess 14 as the light source of the optoelectronic component.
- a plurality of light-sensitive diodes 18 are arranged as light sensors on the surface of the substrate 10 outside the recess 14.
- the SMD light-emitting diode 16 and the light-sensitive diodes 18 are connected to conductor tracks or contacted by conductor tracks in order to supply and tap electrical signals.
- the SMD light-emitting diode 16 is connected to a conductor track 22 via one or more bond wires 20.
- a disadvantage of the conventional optoelectronic component shown in FIG. 2 is that the production of the pit or recess 14 requires special or additional process steps. This increases the manufacturing costs and, like every process step, the likelihood of a defect and thus the rejection of production.
- Another disadvantage is that metallization or the generation of a conductor track in the recess 14, for example for contacting the side of the SMD light-emitting diode 16 facing the Si substrate 10, is critical. Furthermore, the requirement for precision when mounting the SMD light-emitting diode 16 in the recess 14 is high.
- the bonding wire or wires 20 required for contacting the SMD light-emitting diode 16 require installation space and in particular protrude into the half-space delimited by the plane of the surface 12 and opposite the Si substrate 10. This limits the minimum possible distance between the optoelectronic component and its surface 12 on the one hand and the optical component or the reflecting object on the other. Furthermore, depending on the precision achieved when mounting the SMD light-emitting diode 16, a calibration of the system is required. A function test is only possible after the system or the optoelectronic component has been completed.
- the object of the present invention is to provide an optoelectronic component and a method for its production, as well as an optical sensor, which enable production with little effort.
- the present invention provides an optoelectronic component with a substrate, a light sensor and a light-emitting diode with a light-emitting layer made of an organic material, the light sensor and the light-emitting diode being monolithically integrated with the substrate.
- the present invention provides an optical sensor with an optoelectronic component according to the invention and an optical component, which is arranged opposite the light sensor and the light-emitting diode, for directing light which is emitted by the light-emitting diode to the light sensor, wherein one property of the light received by the light sensor is dependent on the location or the orientation of the optical component.
- the present invention also provides a method for producing an optoelectronic component, comprising the following steps:
- the present invention is based on the idea of integrating an organic light-emitting diode or a light-emitting diode with a light-emitting layer made of an organic material and a light sensor monolithically on a substrate, in particular on a semiconductor substrate, or on a chip.
- An advantage of the present invention is that the optoelectronic component can be manufactured with little production effort and thus easily in large quantities.
- the production of the optoelectronic component according to the invention does not require the creation of a recess, as is required according to the prior art.
- the optoelectronic component according to the invention is produced by means of known and well-controlled semiconductor technologies and using existing devices or equipment.
- the manufacture is simplified in that it does not require the creation of a metallization in a recess. Furthermore, all process steps for producing, metallizing and passivating a recess are omitted.
- Conductor tracks are preferably used to contact the light-emitting diode. Bond wires are not required. In comparison to the prior art, all steps for assembling the SMD light-emitting diode are omitted in the manufacture of the optoelectronic component according to the invention.
- the lateral precision of the manufacturing and the arrangement of the light-emitting diode corresponds to the accuracy of a semiconductor manufacturing process. This is typically below the micrometer scale and is therefore a factor of 10 to 100 better than with the conventionally required assembly of the SMD light-emitting diode, whose lateral inaccuracy is always a few 10 ⁇ m. Furthermore, steps for adjusting or calibrating the installation position of the conventional SMD light-emitting diode 16 are omitted.
- Another advantage of the present invention is that the overall height of a light-emitting diode with a light-emitting layer made of an organic material is extremely small with 150 nm to 160 nm.
- the organic light-emitting diode is thus thinner than passivation layers over conductor tracks of a semiconductor chip.
- Another important advantage of the present invention is that the optoelectronic component is completely finished at the wafer level or before a singulation.
- the optoelectronic component can therefore be tested in the wafer assembly, which enables inexpensive production, in particular in the case of large quantities.
- the optoelectronic component according to the invention can be made very flat and can be brought much closer to an object.
- Another advantage of the present invention is that the optoelectronic component according to the invention can replace a conventional optoelectronic component without requiring changes to a higher-level or downstream system.
- the present invention thus significantly reduces the development and manufacturing costs.
- An essential aspect of the present invention is the combination of light sensors, which are preferably semiconductor light sensors, with an organic light-emitting diode or a light-emitting diode with a light-emitting layer made of an organic material.
- the present invention thus agrees the simple and well-controlled technology of producing semiconductor light sensors, for example photodiodes, phototransistors or photoresistive components, with the advantages of the organic light-emitting diode that is easy to manufacture.
- FIG. 1 shows a schematic perspective illustration of an optoelectronic component in accordance with a preferred exemplary embodiment of the present invention.
- Fig. 2 is a schematic representation of a section through a conventional optoelectronic component.
- FIG. 1 is a schematic illustration of a perspective view of an optoelectronic component in accordance with a preferred exemplary embodiment of the present invention.
- An Si substrate 30 has eight light sensors 34a,... 34h and a light-emitting diode 36 on a surface 32.
- the light sensors 34a,... 34h and the light-emitting diode 36 each have an essentially rectangular or square shape.
- the light sensors 34a, ..., 34h and the light-emitting diode 36 are arranged in the form of a grid in the form of three adjacent rows of three components, the light-emitting diode 36 being in the middle and being surrounded on all sides by the light sensors 34a, ..., 34h ,
- the light sensors 34a, ..., 34h are preferably semiconductor light sensors, for example photodiodes, phototransistors, photoresistive components or other photosensitive components which have an electrical property, which is changed in a known manner by incident light.
- the light diode 36 comprises a light emitting layer made of an organic material or an organic compound.
- the light-emitting layer can be part of a layer stack composed of a plurality of layers, layers of the layer stack containing different organic compounds.
- the light diode 36 is electrically contacted by means of conductor tracks 38a, 38b.
- the conductor tracks 38a, 38b are each arranged between two light sensors 34b, 34c and 34f, 34g.
- the conductor tracks 38a, 38b connect the light-emitting diode 36 to connection contact surfaces or connection pads 40a, 40b, which are arranged on the sides of the light sensors 34c, 34g facing away from the light-emitting diode 36.
- the contact pads 40a, 40b are contacted, for example, by means of bond wires.
- through-hole conductors lead from the connection contact surfaces 40a, 40b to the surface 42 of the Si substrate 30 facing away from the light sensors 34a, ..., 34h and the light-emitting diode 36.
- Further contact connection surfaces are then preferably formed on the surface 42 of the Si substrate 30, which are provided for flip-chip mounting of the chip or the Si substrate 30 on a further substrate, for example a printed circuit board.
- Corresponding conductor tracks and connection contact surfaces are preferably also provided for the light sensors 34a,... 34h, but not shown in the sense of a clear representation in FIG. 1.
- the light-emitting diode 36 can have a very low overall height. It preferably has a height of approximately 150 nm to 160 nm.
- a semiconductor light-emitting diode typically has an overall height that is several orders of magnitude larger and emits on the macroscopic side surface light. Direct irradiation of light from the semiconductor light-emitting diode onto the surrounding light sensors is prevented, for example, in the conventional optoelectronic component illustrated at the beginning with reference to FIG. 2 by arranging the light-emitting diode in a recess 14.
- the light-emitting diode 36 of the optoelectronic component according to the present invention has such a low overall height that it emits very little light at its edges in the lateral direction.
- Direct radiation of light from the light-emitting diode 36 onto the light sensors 34a,... 34h is furthermore preferably reduced or prevented by a suitable shaping of the border of the light-emitting diode 36.
- a suitable shaping of the border is, for example, an arrangement of narrow conductor tracks or corresponding metallization structures between the light-emitting diode 36 and the adjacent or adjacent light sensors 34a,... 34h.
- These conductor tracks or metallization structures then represent a type of rampart that prevents a linear propagation of light from the light-emitting diode 36 to one of the light sensors 34a,... 34h.
- these walls are formed from semiconductor oxide or further increased by a passivation layer applied over the conductor tracks.
- An alternative arrangement for reducing stray light or a direct irradiation of light from the light-emitting diode 36 onto the light sensors 34a,... 34h is the arrangement of the light-emitting diode 36 in a recess or recess in the surface 32 of the Si substrate 30.
- a substantially smaller depth of the recess is sufficient to sufficiently radiate scattered light from the light-emitting diode 36 onto the light sensors 34a,... 34h to reduce.
- the depth of the recess is preferably at least as great as the overall height of the light-emitting diode 36. Special the depth of the recess is preferably only a few to a few ⁇ m.
- the optoelectronic component according to the invention shown in FIG. 1 is integrated monolithically or in one piece.
- a completely produced and functional light-emitting diode 16 is inserted into the depression 14 of the substrate 10.
- the light-emitting diode 36 of the optoelectronic component according to the invention is only produced on the surface 32 of the Si substrate 30.
- one or more optically active or light-emitting layers made of an organic material or an organic chemical substance, electrically conductive layers and possibly further layers with predetermined electrical or optical properties are generated in succession.
- the light-emitting diode 36 is thus only produced on the surface 32 of the Si substrate 30.
- the light emitting diode 36 is connected to the Si substrate 30 in one piece and is inseparable. It cannot be easily separated from the Si substrate 30 without destroying its function.
- a function-maintaining separation of the light-emitting diode 36 from the Si substrate 30 would only be possible with an extreme technological effort. For example, the Si substrate 30 could be removed from the back of the light emitting diode 36 by etching. However, this would destroy the Si substrate 30.
- an optical component is arranged opposite and preferably parallel to the surface 32 of the Si substrate 30.
- the optical component is rigidly connected to a device which is relative to the optoelectronic see component is rotatable about an axis which is preferably arranged substantially perpendicular to the surface 32 of the Si substrate 30 and further preferably substantially in the middle of the light emitting diode 36.
- the optical component reflects, diffracts or directs light from the light-emitting diode 36 onto the light sensors 34a, ..., 34h in another way.
- the optical component has an optical property which has the consequence that not all light sensors 34a,... 34h receive light of the same intensity.
- the optical component preferably comprises an optical grating or a grating structure on which the light from the light-emitting diode 36 is diffracted by interference.
- the diffracted light has intensity maxima in different solid angle ranges, which are separated from one another by intensity minima in between.
- the solid angle ranges in which the intensity maxima occur and thus the intensity distribution on the light sensors 34a,... 34h is dependent on the angular position of the optical grating relative to the optoelectronic component.
- the angular position of the optical grating can thus be inferred from the light intensities received by the individual light sensors 34a,... 34h.
- the evaluation of the light intensities received by the light sensors 34a, ..., 34h or the measurement signals generated by the light sensors 34a, ..., 34h is preferably carried out by a logic circuit, which is also particularly preferred with the light sensors 34a, ..., 34h and the light-emitting diode 36 is integrated or embodied in one piece on the Si substrate 30.
- the logic circuit determines the angular position of the optical grating relative to the optoelectronic component from the measurement signals of the light sensors 34a,... 34h representing the received intensities. This angular position is preferably output in the form of an analog or digital electrical signal.
- the optical component alternatively comprises one or more other structures which direct light from the light-emitting diode 36 to the light sensors 34a,... 34h in a manner which depends on the angular position of the optical component relative to the optoelectronic component.
- the optoelectronic component according to the invention alternatively has a plurality of light-emitting diodes or a different number of light sensors.
- the light-emitting diode or the plurality of light-emitting diodes and the light sensor or the plurality of light sensors have any shapes and any arrangement which are suitable for the intended application of the optoelectronic component.
- the light sensors and one or more light-emitting diodes are preferably arranged linearly.
- the optoelectronic component preferably has a single light sensor and a single light-emitting diode.
- the optoelectronic component preferably has a plurality of light sensors which are arranged in an array.
- One or more light emitting diodes 36 are also arranged in the array or on its edge.
- the optoelectronic component can be combined with an imaging optical system comprising one or more mirrors or lenses for the acquisition of simple geometric images or for other applications.
- Polarization of light can be evaluated in order to determine a location, an orientation or an angular position, a distance, a size or another property of an optical component or a light-reflecting object.
- the light sensor or the plurality of light sensors and the light-emitting diode or the plurality of light-emitting diodes are preferably arranged on one and the same surface of a substrate and thus essentially coplanar.
- the light sensor or the plurality of light sensors and the light-emitting diode or the plurality of light-emitting diodes are arranged on a curved surface of a substrate or on two or more non-parallel surfaces.
- the light sensors are arranged on a surface of a substrate on which components are usually formed, the light-emitting diode or the plurality of light-emitting diodes being arranged on a lateral surface which is arranged at right angles to the first surface. This is possible in particular because the light-emitting organic layer and the further layers of the light-emitting diode can be produced independently of the crystallographic property or a layer structure of a semiconductor substrate.
- the starting point is a Si wafer or an Si substrate 30.
- the Si substrate 30 has the typical specifications that a substrate for light sensors or light-sensitive sensors and for the corresponding semiconductor manufacturing process for the production of light sensors must have. In particular, it is preferably a high-resistance Si wafer.
- any substrate can be used, which preferably has a semiconductor material.
- lateral areas are defined using masking and lithography methods.
- the light sensors 34a,... 34h are produced in the Si substrate 30 in accordance with the conventional semiconductor manufacturing technology by implantation or diffusion of dopants.
- the space for the light-emitting diode 36 to be produced later is preferably left free.
- the light sensors 34a,... 34h of the optoelectronic component according to the invention are preferably produced using CMOS technology. Alternatively, another technology can be used.
- the light-emitting diode 36 is produced by applying the corresponding starting materials.
- an optically active or light-emitting layer is produced from an organic material or an organic chemical compound.
- a layer system made of organic materials is produced, one or more layers of the layer system being provided for light emission.
- the layers of the light-emitting diode 36 are generated in an in-line production system.
- the Si substrate 30 is transferred to the process-compatible production for the organic light-emitting diode 36.
- the organic light-emitting diode or the light-emitting diode 36 with the light-emitting organic layer is produced in the free space on the surface 32 of the Si substrate 30 that was left out when the light sensors 34a,... 34h were generated.
- OLED Organic Light Emitting Diode
- the finished circuit or the finished optoelectronic component is provided with a thin layer passivation.
- the passivation is opened at the intended locations to form connection contact areas.
- the passivation is applied directly using a shadow mask.
- the production described is preferably carried out at the wafer level or wafer level. Before the wafer is separated into individual optoelectronic components, the finished circuits in the wafer assembly are tested. This testing is preferably carried out according to standard methods on a conventional wafer tester. The optoelectronic components of the wafer are contacted using so-called needle cards. In contrast to the conventional optoelectronic components described at the outset with reference to FIG. 2, the optoelectronic component according to the invention is not completely and completely functional only after singling and bonding but before the singling, that is to say in the wafer assembly. The optoelectronic component according to the invention is therefore preferably completely tested with regard to its entire functionality, i. H.
- optical or electro-optical properties of each individual optoelectronic component of the wafer are also recorded or measured.
- optical components or corresponding patterns or structures are preferably arranged opposite the optoelectronic components of the wafer.
- defective optoelectronic components are identified by marking or by marking or in a wafer map registered and discarded immediately after separation.
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Physics & Mathematics (AREA)
- Microelectronics & Electronic Packaging (AREA)
- General Physics & Mathematics (AREA)
- Computer Hardware Design (AREA)
- Electromagnetism (AREA)
- Condensed Matter Physics & Semiconductors (AREA)
- Chemical & Material Sciences (AREA)
- Composite Materials (AREA)
- Manufacturing & Machinery (AREA)
- Photo Coupler, Interrupter, Optical-To-Optical Conversion Devices (AREA)
- Length Measuring Devices By Optical Means (AREA)
- Solid State Image Pick-Up Elements (AREA)
- Light Receiving Elements (AREA)
Description
Claims
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PCT/EP2003/005253 WO2004102681A1 (de) | 2003-05-19 | 2003-05-19 | Optoelektronisches bauelement mit einer leuchtdiode und einem lichtsensor |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1597774A1 true EP1597774A1 (de) | 2005-11-23 |
EP1597774B1 EP1597774B1 (de) | 2007-03-14 |
Family
ID=33442618
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP03735418A Expired - Lifetime EP1597774B1 (de) | 2003-05-19 | 2003-05-19 | Optoelektronisches bauelement mit einer leuchtdiode und einer mehrzahl von lichtsensoren |
Country Status (5)
Country | Link |
---|---|
US (1) | US20060091293A1 (de) |
EP (1) | EP1597774B1 (de) |
AT (1) | ATE357061T1 (de) |
DE (1) | DE50306813D1 (de) |
WO (1) | WO2004102681A1 (de) |
Families Citing this family (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102006040790B4 (de) * | 2006-08-31 | 2012-04-26 | Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. | Reflexkoppler mit integriertem organischen Lichtemitter sowie Verwendung eines solchen Reflexkopplers |
US8405115B2 (en) * | 2009-01-28 | 2013-03-26 | Maxim Integrated Products, Inc. | Light sensor using wafer-level packaging |
GB201020024D0 (en) | 2010-11-25 | 2011-01-12 | St Microelectronics Ltd | Radiation sensor |
GB201020023D0 (en) | 2010-11-25 | 2011-01-12 | St Microelectronics Ltd | Radiation sensor |
GB2486000A (en) | 2010-11-30 | 2012-06-06 | St Microelectronics Res & Dev | Optical proximity detectors with arrangements for reducing internal light propagation from emitter to detector |
GB2485998A (en) | 2010-11-30 | 2012-06-06 | St Microelectronics Res & Dev | A single-package optical proximity detector with an internal light baffle |
GB2485996A (en) | 2010-11-30 | 2012-06-06 | St Microelectronics Res & Dev | A combined proximity and ambient light sensor |
US20130240744A1 (en) * | 2011-05-03 | 2013-09-19 | Trusted Semiconductor Solutions, Inc. | Neutron detection chip assembly |
US8686543B2 (en) * | 2011-10-28 | 2014-04-01 | Maxim Integrated Products, Inc. | 3D chip package with shielded structures |
AT513747B1 (de) * | 2013-02-28 | 2014-07-15 | Mikroelektronik Ges Mit Beschränkter Haftung Ab | Bestückungsverfahren für Schaltungsträger und Schaltungsträger |
CN113594104B (zh) * | 2021-08-10 | 2024-05-28 | 南方科技大学 | 一种单片集成芯片及其应用 |
Family Cites Families (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH06275864A (ja) * | 1993-03-24 | 1994-09-30 | Mitsui Toatsu Chem Inc | 光−光変換素子 |
US5629533A (en) * | 1995-02-06 | 1997-05-13 | Motorola | Optical sensor and method |
GB9808061D0 (en) * | 1998-04-16 | 1998-06-17 | Cambridge Display Tech Ltd | Polymer devices |
US6392617B1 (en) * | 1999-10-27 | 2002-05-21 | Agilent Technologies, Inc. | Active matrix light emitting diode display |
US6509574B2 (en) * | 1999-12-02 | 2003-01-21 | Texas Instruments Incorporated | Optocouplers having integrated organic light-emitting diodes |
US20040252867A1 (en) * | 2000-01-05 | 2004-12-16 | Je-Hsiung Lan | Biometric sensor |
JP2001203078A (ja) * | 2000-01-19 | 2001-07-27 | Tdk Corp | 発光受光素子の駆動装置、発光受光装置、通信システムおよび表示装置 |
GB0014961D0 (en) * | 2000-06-20 | 2000-08-09 | Koninkl Philips Electronics Nv | Light-emitting matrix array display devices with light sensing elements |
US6320325B1 (en) * | 2000-11-06 | 2001-11-20 | Eastman Kodak Company | Emissive display with luminance feedback from a representative pixel |
-
2003
- 2003-05-19 DE DE50306813T patent/DE50306813D1/de not_active Expired - Lifetime
- 2003-05-19 WO PCT/EP2003/005253 patent/WO2004102681A1/de active IP Right Grant
- 2003-05-19 EP EP03735418A patent/EP1597774B1/de not_active Expired - Lifetime
- 2003-05-19 AT AT03735418T patent/ATE357061T1/de not_active IP Right Cessation
-
2005
- 2005-11-18 US US11/283,147 patent/US20060091293A1/en not_active Abandoned
Non-Patent Citations (1)
Title |
---|
See references of WO2004102681A1 * |
Also Published As
Publication number | Publication date |
---|---|
EP1597774B1 (de) | 2007-03-14 |
ATE357061T1 (de) | 2007-04-15 |
DE50306813D1 (de) | 2007-04-26 |
WO2004102681A1 (de) | 2004-11-25 |
US20060091293A1 (en) | 2006-05-04 |
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